Phosphor and LED light emitting device using the same
US9169436B2 · kind B2 · utility
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3Claims
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Key dates
| Filing date | May 14, 2012 |
| Grant date | Oct 27, 2015 |
| Priority date | — |
| Expiry date | Nov 20, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/7789
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An LED light emitting device is provided that has high color rendering properties and is excellent color uniformity and, at the same time, can realize even luminescence unattainable by conventional techniques. A phosphor having a composition represented by formula: (Sr2-X-Y-Z-ωBaXMgYMnZEuω)SiO4 wherein x, y, z, and ω are respectively coefficients satisfying 0.1<x<1, 0<y<0.5, 0<z<0.1, y>z, and 0.01<ω<0.2 is provided. The phosphor is used in combination with ultraviolet and blue light emitting diodes having a luminescence peak wavelength of 360 to 470 nm to form an LED light emitting device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.